JP2003215245A - Photo-stimulation luminescent dosimeter, measuring apparatus, and measuring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shape of an element plate and holder, a code system, a radiation measuring apparatus, and a radiation measuring method, which correspond to a photo-stimulation luminescent dosimeter. <P>SOLUTION: A photo-stimulation luminescent dosimeter 10 comprises a detector 1 which uses an OSL crystal or a thermal phosphor as a radiation detecting material, an element plate 2 which holds the detector 1, and a holder 3 which holds the element plate 2. The element plate 2 is provided with at least an element plate control code 6 which controls the element plate. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dosimeter used for personal exposure control and environmental radiation measurement of workers engaged in radiation work such as nuclear power plants and research institutions.

[0002]

2. Description of the Related Art Thermodosimeters, film badges, and glass dosimeters are used as dosimeters for personal exposure management of workers engaged in radiation work such as nuclear power plants and research institutions. In particular, since the thermofluorescence dosimeter can be used repeatedly, it is superior in operation cost to the film badge and has been used for about 30 years.

Management of individual exposure using a thermofluorescence dosimeter will be described. FIG. 9 shows a block diagram of an individual exposure dosimeter used for individual exposure management.

FIG. 9A is a diagram showing the structure of a thermofluorescence dosimeter. The thermofluorescence dosimeter has a detector 9a which uses a thermophosphor such as calcium sulfate as a radiation detecting material, an element plate 9b which holds the detector 9a, and an element plate 9b which has a cylindrical structure and is inserted inside. Holder 9 to hold
It is a structure in which three parts of c and c are integrated.

FIG. 9B is a diagram showing the structure of an individual exposure dosimeter. The personal exposure dosimeter has a structure in which two parts, a thermofluorescence dosimeter and a hanger 4 provided with a clip so that the thermofluorescence dosimeter is inserted and easily attached to clothes of an operator, are integrated.

A measuring method of the thermofluorescence dosimeter will be described. First, the radiation dose is obtained by the product of the electric signal amount, the conversion constant, the sensitivity correction coefficient, and the device correction coefficient.

The electric signal amount expresses the light emitted when the detector receives the excitation energy as the electric signal amount, and is expressed by using the number of pulses or the integrated value of the current value. The conversion constant is a constant for converting the electric signal amount into the radiation amount, and is determined by the component or amount of the detector. The sensitivity correction coefficient is a correction coefficient determined depending on the detection body, and is expressed by the ratio of the light emission amount of the reference detection body and the light emission amount of the detection body. The device correction coefficient is a correction coefficient that is determined depending on the measuring device, and measures the light receiving section that receives the light emitted when the sensing body receives the excitation energy and outputs the electrical signal, and the electrical signal output by the light receiving means. Then, it is determined by the performance of the measuring unit that outputs the electric signal amount. The device correction factor is
It is expressed as the ratio of the radiation dose when the reference detector is measured by the reference measuring device and the radiation dose when the reference detector is measured by the measuring device.

Next, a code system in personal exposure management will be described. FIG. 10 shows the code system of the thermofluorescence dosimeter. Personal exposure management is a method that uniquely identifies a user.
The hanger is equipped with a user management barcode 5b on which a D number is printed. Further, the thermofluorescence dosimeter has a holder with a dosimeter management barcode 5a on which a dosimeter identification code for uniquely identifying the dosimeter is printed. The dosimeter identification code is composed of a dosimeter type code indicating the type of dosimeter, a unique serial number, and a sensitivity rank code that encodes the sensitivity correction coefficient of the detector. Further, the dosimeter type code and the conversion constant have a one-to-one correspondence, and if the dosimeter identification code is determined, the conversion constant can be uniquely determined. The sensitivity rank code has five ranks (0.76 to
0.85, 0.86-0.95, 0.96-1.05,
1.06 to 1.15, 1.16 to 1.25),
It is coded by defining codes of 0, 1, 2, 3, and 4 for each. Table 1 in FIG. 10 shows a correspondence table between the sensitivity rank code and the sensitivity correction coefficient. With this encoding method,
0.1 within the limited data volume of the dosimeter identification code
Sensitivity correction is performed at a management level of 0 unit. The measuring device stores a correspondence table between the dosimeter type code and the conversion constant and a correspondence table between the sensitivity rank code and the value in the storage unit.

As a method of applying an optical information record carrier in the management of personal exposure, for example, Japanese Patent Laid-Open No. 2001-508875.
The gazette is open to the public. The method of giving the user's name, dosimeter control number, and body positioning mark to the dosimeter, and mounting the dosimeter at the position of the body indicated by the body positioning mark to manage individual exposure has been disclosed.

Next, the OSL crystal will be described. OSL
The crystal was developed as a next-generation radiation detection material. As a measurement method when an OSL crystal is used as a dosimeter, for example, JP-A 2000-503396,
Japanese Patent Publication No. 2000-503759 is published. These describe the components of the OSL crystal, the laser irradiation method, and the light receiving measurement method.

Further, in Japanese Patent Application Laid-Open No. 11-237479, a fiber for irradiation light path and a fiber for light reception are bound as one fiber, and a dosimeter composed of an OSL crystal is attached to the tip of the fiber for irradiation light path. A method has been disclosed in which a fiber is irradiated with laser light and OSL light emitted from an OSL crystal is received and measured by a light receiving fiber.

However, OSL crystals have just begun to be put into practical use research, and techniques and know-how that can be put to practical use in individual exposure control and environmental measurement have not been accumulated.

[0013]

The thermofluorescence dosimeter has a premise that the combination of the element plate and the holder does not change because it is repeatedly used. However, since the photostimulation luminescence dosimeter is a destructive reading, the element plate becomes disposable after one measurement. Therefore, in the photostimulable luminescence dosimeter, the combination of the element plate and the holder changes every time measurement is performed. Regarding the management of the combination of the element plate and the holder, there is a big difference between the thermofluorescence dosimeter and the photostimulable luminescence dosimeter.

The present invention has been made in view of the above-mentioned problems, and by applying the radiation measurement technique in personal exposure management and environmental measurement using a thermofluorescence dosimeter to the radiation measurement by the OSL crystal, the photostimulated luminescence dose is obtained. It is to promote the practical application of the meter.

The first object of the present invention is to use the high density optical information recording technology and to design the element plate and the holder for both the thermofluorescence dosimeter and the photostimulable luminescence dosimeter.
A code system, a radiation measuring device, and a radiation measuring method are provided.

A second object of the present invention is to continue to use the manufacturing equipment of the thermofluorescent dosimeter to reduce the equipment installation cost of the manufacturing plant, and as a result, the inexpensive photostimulable luminescence dosimeter and radiation. To provide a measuring device to the market.

[0017]

In order to achieve the above object, the photostimulable luminescence dosimeter according to claim 1 is a detector that uses an OSL crystal or a thermophosphor as a radiation detecting material, and an element that holds the detector. It is composed of a plate and a holder for holding the element plate. Further, the element plate includes at least an element plate management code for managing the element plate.

With the above structure, the photostimulation luminescence dosimeter can provide the element plate with the element plate management code for managing the element plate.

The element plate management code of the photostimulable luminescence dosimeter of claim 2 includes at least an element plate type code indicating the type of element plate, and a sensitivity correction coefficient for correcting the sensitivity difference of the detector.

With the above structure, the photostimulation luminescence dosimeter can directly record the element plate management code and the sensitivity correction coefficient on the element plate. With thermofluorescent dosimeters, it was not possible to directly know the type of element plate, and there was only a method of tracing from the information of the dosimeter identification code, but with photostimulated luminescence dosimeters, it is possible to directly read the element plate management code. I can know. In the thermofluorescence dosimeter, the sensitivity correction coefficient was divided into five ranks and managed, but in the photostimulation luminescence dosimeter, for example, by recording up to the second decimal point, the control level from 0.10 unit to 0. The measurement accuracy can be improved to the management level of 01 unit.

The element plate management code of the photostimulable luminescence dosimeter of claim 3 includes at least an element plate type code indicating the type of element plate and a manufacturing lot number of the detector.

With the above structure, the photostimulation luminescence dosimeter can directly record the element plate management code and the manufacturing lot number of the detector on the element plate. With the thermofluorescence dosimeter, it was not possible to directly know the manufacturing lot number of the detector, and there was only a way to trace it from the manufacturing record of the factory, but with the photostimulable luminescence dosimeter, it is possible to read the manufacturing lot number of the detector. You can find out directly at.

The element plate management code of the photostimulable luminescence dosimeter of claim 4 uses high density optical information recording.

With the above structure, the photostimulable luminescence dosimeter has a device plate management code within a limited area of several millimeters square of the device plate of the thermofluorescence dosimeter by recording high density optical information represented by a two-dimensional bar code. Can be recorded. As a result, the element plate and holder of the thermofluorescence dosimeter can be used as a photostimulation luminescence dosimeter without changing the shape and dimensions.

The photostimulable luminescence dosimeter of claim 5 comprises a detector using an OSL crystal or a thermophosphor as a radiation detecting material, an element plate for holding the detector, and a holder for holding the element plate. To be done. Further, the element plate comprises at least an element plate management code for managing the element plate,
The holder comprises a holder identification code that uniquely identifies the holder.

With the above structure, the photostimulation luminescence dosimeter can provide the element plate with the element plate management code for managing the element plate and the holder with the holder identification code for uniquely identifying the holder.

The element plate management code of the photostimulable luminescence dosimeter of claim 6 includes at least an element plate type code indicating the type of element plate, and the holder identification code includes at least a holder type code indicating the type of holder.

With the above structure, the photostimulation luminescence dosimeter can output the element plate type code and the holder type code to the radiation measuring device. In the radiation measuring apparatus of claim 11, the element plate management code comparison method of claim 12 and the information record carrier of claim 13, it can be confirmed that the combination of the element plate type code and the holder type code is correct.

In the photostimulable luminescence dosimeter of claim 7, at least one of the element plate management code and the holder identification code uses high density optical information recording.

With the above-mentioned structure, the photostimulated luminescence dosimeter is provided with a high-density optical information recording represented by a two-dimensional bar code, and the elements of the thermofluorescence dosimeter and the holder are each provided in a limited area of several millimeters square. The plate management code and holder identification code can be recorded. As a result, the element plate and holder of the thermofluorescence dosimeter can be used as a photostimulation luminescence dosimeter without changing the shape and dimensions.

A radiation measuring apparatus according to claim 8 is a radiation measuring apparatus for stimulating a detecting body using an OSL crystal or a thermophosphor as a radiation detecting material, for receiving and measuring light emitted from the OSL crystal or the thermophosphor. First reading means for reading the element plate management code recorded on the element plate, stimulating means for stimulating the detection body, light receiving means for receiving light emitted by the detection body and outputting an electric signal, and the light receiving means. Measuring means for measuring an electric signal output by the device and outputting it as an electric signal amount; a correspondence table of a conversion constant for converting the electric signal amount into a radiation amount and an element plate type code of an element plate management code; and an apparatus correction coefficient. And a conversion constant acquisition means for acquiring a conversion constant corresponding to the element plate management code from the storage means, and an element plate management code. First correction coefficient acquisition means for acquiring a sensitivity correction coefficient from the storage means, second correction coefficient acquisition means for acquiring a device correction coefficient from the storage means, at least the electric signal amount, the conversion constant, and the sensitivity correction coefficient. And a device correction coefficient for calculating the radiation dose.

With the above arrangement, the radiation measuring device can measure the radiation dose of the detector of the photostimulated luminescence dosimeter.

The radiation measuring method according to claim 9 is a radiation measuring method for stimulating a detector using an OSL crystal or a thermoluminescent material as a radiation detecting material, and receiving and measuring light emitted from the OSL crystal or the thermoluminescent material. Stimulate a detector using an OSL crystal or a thermophosphor as a radiation detector material,
In a radiation measuring method for receiving and measuring light emitted from an OSL crystal or a thermophosphor, an element plate management code reading step of reading an element plate management code recorded on an element plate, a step of stimulating a sensing element, and the sensing element From the correspondence table of the electric signal amount output step of receiving the light emitted by the device and outputting it as an electric signal amount, the conversion constant for converting the electric signal amount into the radiation amount, and the element plate type code of the element plate management code A conversion constant acquisition step for acquiring a conversion constant corresponding to the element plate management code read in the element plate management code reading step, and a sensitivity correction for acquiring a sensitivity correction coefficient from the element plate management code read in the element plate management code reading step The coefficient reading step and the device correction coefficient are acquired. An apparatus correction coefficient acquisition step, an electric signal quantity measured in at least the electric signal quantity output step, a conversion constant acquired in the conversion constant acquisition step, a sensitivity correction coefficient acquired in the sensitivity correction coefficient acquisition step, and the apparatus Calculating the radiation dose using the device correction coefficient acquired in the correction coefficient acquisition step.

With the above structure, the radiation measuring method can measure the radiation dose of the detector of the photostimulated luminescence dosimeter.

The information record carrier of claim 10 reads the element plate management code recorded on the element plate, a step of stimulating the sensing element, and a step of stimulating the light emitted by the sensing element. In the element plate management code reading step from the correspondence table of the electric signal quantity output step for outputting the electric signal quantity as the electric signal quantity and the conversion constant for converting the electric signal quantity into the radiation quantity and the element plate type code of the element plate management code A conversion constant acquiring step for acquiring a conversion constant corresponding to the read element plate management code; a sensitivity correction coefficient reading step for acquiring a sensitivity correction coefficient from the element plate management code read in the element plate management code reading step; A device correction coefficient acquisition step of acquiring a correction coefficient, At least the electric signal amount measured in the electric signal amount output step, the conversion constant acquired in the conversion constant acquisition step, the sensitivity correction coefficient acquired in the sensitivity correction coefficient acquisition step, and the device correction coefficient acquisition step And calculating the radiation dose using the corrected device correction factor.

With the above structure, the information record carrier can store a computer program for realizing the radiation measuring method, and can provide the computer program for realizing the radiation measuring method to any radiation measuring apparatus.

The radiation measuring apparatus according to claim 11 is a radiation measuring apparatus for stimulating a detector that uses an OSL crystal or a thermophosphor as a radiation detecting material, and receiving and measuring the light emitted from the OSL crystal or the thermophosphor. A first reading means for reading the element plate management code recorded on the element plate, a second reading means for reading the holder identification code recorded on the holder, and a correspondence table of element plate type codes corresponding to the holder identification code are provided. Storage means for storing,
Element plate type code acquisition means for acquiring the element plate type code corresponding to the holder identification code from the recording means, element plate type code of the element plate management code read by the first reading means, and the element plate type It is composed of comparison means for comparing with the element plate type code acquired by the code acquisition means.

With the above arrangement, the radiation measuring apparatus can confirm that the combination of the element plate type code recorded on the element plate and the holder type code recorded on the holder is correct.

An element plate management code comparison method according to a twelfth aspect is the element plate management code comparison method in the radiation measurement apparatus, wherein the element plate management code recorded in the element plate is the element plate management code comparison method in the radiation measurement apparatus. An element plate management code reading step, a holder identification code reading step of reading a holder identification code recorded in the holder, and a holder read in the holder identification code reading step from a correspondence table of element plate type codes corresponding to the holder identification code An element plate type code obtaining step of obtaining an element plate type code corresponding to the identification code; an element plate type code of the element plate management code read in the element plate management code reading step; And a device plate type code comparing step of comparing the element plate type code acquired in the element plate type code acquisition step.

With the above configuration, the element plate management code comparison method can confirm that the combination of the element plate type code recorded on the element plate and the holder type code recorded on the holder is correct.

According to a thirteenth aspect of the present invention, there is provided an information record carrier, in an element plate management code comparing method in a radiation measuring apparatus, an element plate management code reading step of reading an element plate management code recorded on an element plate, and a holder recorded in the holder. An element plate type that acquires an element plate type code corresponding to the holder identification code read in the holder identification code reading step from a holder identification code reading step of reading the identification code and a correspondence table of element plate type codes corresponding to the holder identification code The code acquisition step is compared with the element plate type code of the element plate management code read in the element plate management code reading step and the element plate type code acquired in the element plate type code acquisition step. Storing a computer program comprising an element plate type code comparing step of.

With the above structure, the information record carrier stores a computer program for implementing the element plate management code comparison method, and provides a computer program for implementing the element plate management code comparison method in any radiation measuring apparatus. can do.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) First, an embodiment of the photostimulated luminescence dosimeter according to claims 1 to 4 will be described. Figure 1
FIG. 1A is a configuration diagram of the photostimulated luminescence dosimeter of the present invention, and FIG. 1B is a side view of the detector.

The photostimulable luminescence dosimeter 10 has an OS
It is composed of a detector 1 that uses an L crystal or a thermophosphor as a radiation detecting material, an element plate 2 that holds the detector 1, and a holder 3 that holds the element plate 2. Detector 1
Is a radiation detection material 10a made of an OSL crystal or a thermophosphor, and is fixed on the base film 10b with an adhesive or the like.
The upper part thereof is covered with a transparent cover film 10c. The element plate management code 6 is recorded on the element plate 2 by high-density optical information recording such as a two-dimensional code. The element plate management code 6 includes an element plate type code indicating the type of the element plate 2, a sensitivity correction coefficient for correcting the sensitivity difference of the detection body 1, and a manufacturing lot number of the detection body 1.

Optically stimulated luminescence dosimeter 1 having the above structure
For 0, the element plate type code of the element plate 2, the sensitivity correction coefficient of the detector 1 and the manufacturing lot number can be recorded on the element plate 2. (Embodiment 2) An embodiment of the photostimulated luminescence dosimeter according to claims 5 to 7 will be described. FIG. 2 shows a configuration diagram of the photostimulated luminescence dosimeter of the present embodiment.

The photostimulable luminescence dosimeter 10 comprises a detector 1, an element plate 2 and a holder 3. The element plate management code 6 is recorded on the element plate 2 by high-density optical information recording such as a two-dimensional code. The element plate management code 6 includes an element plate type code indicating the type of the element plate 2. The holder identification code 7 is recorded on the holder 3 by high-density optical information recording such as a two-dimensional code. The holder identification code 7 includes a holder type code indicating the type of the holder 3 and a unique serial number,
The holder identification code 0001 is written on the holder 3.

Optically stimulated luminescence dosimeter 1 having the above structure
0 can record the element plate type code 6 of the element plate 2 on the element plate 2 and the holder type code 7 of the holder 3 on the holder 3. (Embodiment 3) A radiation measurement value device according to claim 8 for measuring the photostimulable luminescence dosimeter according to claims 1 to 4, a radiation measurement method according to claim 9, and a radiation measurement method according to claim 10. An example of the information recording carrier of (1) will be described. Figure 3
5 to FIG. 10, the third embodiment will be described.

FIG. 3 is a block diagram of the radiation measurement value apparatus of the present invention. The first reading unit 11 reads the element plate management code 6 recorded on the element plate 2. For example, a two-dimensional code reader is used as the first reading means. The element plate withdrawing means 8 withdraws the element plate 2 from the inside of the holder 3 to a position where the detectors 1a and 1b can be measured. Further, the element plate drawing means 8 returns the element plate 2 to the inside of the holder 3 after the measurement is completed. For example, as the element plate drawing means 8, a rack and pinion mechanism and a motor are used. The stimulating means 12 outputs excitation energy for stimulating the sensing bodies 1a and / or 1b to stimulate the sensing bodies 1a and / or 1b. For example, as the stimulating means 12, a laser oscillator, a light emitting diode, or an infrared lamp is used. The light receiving means 13 receives the light emitted by the detection bodies 1a and / or 1b and outputs an electric signal. For example, as the light receiving means 13, a photomultiplier tube is used. Measuring means 14
Measures the electric signal output by the light receiving means 13 and outputs it as an electric signal amount. For example, this measuring means 14
A pulse signal counter is used. The storage unit 15 stores a correspondence table between the conversion constant for converting the electric signal amount into the radiation amount and the element plate type code of the element plate management code 6 and the apparatus correction coefficient. For example, a hard disk is used as the storage unit 15. The conversion constant acquisition means 16 acquires the conversion constant corresponding to the element plate management code from the storage means 15. For example, the conversion constant acquisition unit 16 uses a file reading system that reads a file in which the conversion constant is stored from the storage unit 15. The first correction coefficient acquisition means 17 is
The sensitivity correction coefficient is acquired from the element plate management code 6. For example, the first correction coefficient acquisition unit 17 uses a data search system that reads the read data from the first reading unit and acquires the sensitivity correction coefficient from the read data. The second correction coefficient acquisition means 18 acquires a device correction coefficient. For example, this second correction coefficient acquisition means 18
A file reading system for reading the file in which the device correction coefficient is stored from the storage means 15 is used. The calculating means 19 calculates the radiation dose using at least the electric signal amount, the conversion constant, the sensitivity correction coefficient, and the device correction coefficient. For example, this calculation means 19
Uses a CPU. FIG. 10 shows the formula for calculating the radiation dose. In addition, in FIG.
Although individually mounted, the object of the present invention can be achieved without depending on the number of detectors 1.

FIG. 4 shows a code system diagram when two detectors 1 are attached to the element plate 2. The element plate management code 6 is an element plate type code indicating the type of the element plate 2 and a sensitivity correction coefficient and a manufacturing lot number for correcting the sensitivity difference between the first detector 1a and the second detector 1
It is composed of a sensitivity correction coefficient for correcting the sensitivity difference of b and a manufacturing lot number. The storage means 15 is a storage means 15.
Stores a conversion table for converting an electric signal amount into a radiation dose and a correspondence table between the element plate type code of the element plate management code 6 and an apparatus correction coefficient.

FIG. 5 shows a flowchart of the radiation measuring method of the radiation measuring apparatus 100 of the present invention. In this flowchart, the element plate 2 is pulled out from the inside of the holder 3 by the element plate pulling-out means 8 and the position where the first detection body 1a can be measured and the element plate management code 6
Will be described starting from the state in which it can be read.

Radiation measurement of the first detector 1a is started (step 1000). In the following explanation,
The step is denoted by S.

The element plate pull-out means 8 sets the first detector 1a and the element plate management code 6 at positions where they can be measured and read (S1010).

The element plate management code 6 recorded on the element plate is read by the first reading means 11 (S10).
20). FIG. 4A shows a code system diagram of the element plate management code 6.

The detector 1a is stimulated by irradiating the excitation energy from the stimulation means 12 (S1030).

The light receiving means 13 receives the light emitted from the detection body 1a, and the measuring means 14 outputs it as an electric signal amount (S1040).

The element plate management code 6 read in the above (S1010) from the correspondence table of the conversion constant for converting the electric signal amount into the radiation dose by the conversion constant acquisition means 16 and the element plate type code of the element plate management code. A conversion constant corresponding to the element plate type code is acquired from the storage unit 15 (S1050). Figure 4
A code system diagram of the storage means 15 is shown in (b).

The first correction coefficient acquisition means 17 acquires the sensitivity correction coefficient of the first detector 1a from the element plate management code 6 read in (S1010) (S1060).

The second correction coefficient acquisition means 18 acquires the apparatus correction coefficient from the storage means 15 (S1070).

At least the above (S1
040), and the electric signal amount measured in (S10)
50) and the conversion constant obtained in (50)
0) and the sensitivity correction coefficient obtained in (0)
The radiation dose is calculated using the device correction coefficient obtained in 0) (S1080).

The measurement of the first detector 1a is completed (S1).
090).

When the measurement of the first detection body 1a is completed, the element plate drawing means 8 pulls out the element plate 2 to a position where the second detection body 1b can be measured, and the same measurement as that of the first detection body 1a is performed. The second detector 1b is measured by the procedure. When the measurement of the second detection body 1b is completed, the element plate 2 is returned to the inside of the holder 3 by the element plate drawing means 8. According to the above procedure, one radiation measurement of the photostimulation luminescence dosimeter 10 is performed.

The radiation measuring apparatus 100 having the above structure can measure the radiation dose of the photostimulation luminescence dosimeter 10. (Embodiment 4) A radiation measurement value apparatus according to claim 11 for comparing the element plate management codes of the photostimulated luminescence dosimeters according to claims 5 to 7, and an element plate management code according to claim 12. An example of the comparison method and the information record carrier according to claim 13 will be described. The fourth embodiment will be described with reference to FIGS.

FIG. 6 shows a block diagram of the radiation measurement value apparatus of the present invention. The first reading unit 11 reads the element plate management code 6 recorded on the element plate 2. For example, as the first reading means 11, a two-dimensional code reader is used. The element plate drawing means 8 is the element plate 2
Is pulled out from inside the holder 3, and is pulled out to a position where the detection bodies 1a and 1b can be measured. Further, the element plate drawing means 8 returns the element plate 2 to the inside of the holder 3 after the measurement is completed. For example, as the element plate drawing means 8, a rack and pinion mechanism and a motor are used. The second reading means 21 uses the holder identification code 7 recorded in the holder.
Read. For example, as the second reading means 21, a two-dimensional code reader is used. The storage unit 15 stores a correspondence table of element plate type codes corresponding to holder identification codes. For example, a hard disk is used as the storage unit 15. The element plate type code acquisition unit 23 acquires the element plate type code corresponding to the holder identification code 7 from the recording unit 15. For example, the element plate type code acquisition means 23 uses a file reading system that reads a file in which the element plate type code corresponding to the holder identification code 7 is stored. The comparing means 22 compares the element plate type code of the element plate management code 6 read by the first reading means 11 with the element plate type code obtained by the element plate type code obtaining means 23. For example, a CPU is used as the comparison unit 22.

FIG. 7 shows a code system diagram when two detectors 1 are attached to the element plate 2. The element plate management code 6 is composed of an element plate type code indicating the type of the element plate 2. Holder identification code 7
Is composed of a holder type code indicating the type of the holder 3 and a unique serial number. The recording means 15 stores the element plate type code corresponding to the holder identification code 7.

FIG. 8 shows a flow chart of the element plate management code comparison method of the radiation measuring apparatus 100 of the present invention. In this flowchart, the holder is at a position where the holder identification code 7 can be read, and the element plate drawing means 8 pulls the element plate 2 out of the holder 3 so that the element plate management code 6 can be read. The description will start from the state.

The element plate management code comparison of the element plate management code 6 is started (step 2000). In addition, in the following description, step is described as S.

The element plate 2 is read by the first reading means 11.
The element plate management code 6 recorded in is read (S2
010). FIG. 7A shows a code system diagram of the element plate management code 6.

The holder reading code 7 recorded on the holder 3 is read by the second reading means 21 (S2020).

The element plate type code acquisition means 23 acquires the element plate type code corresponding to the holder identification code 7 read in (S2020) from the storage means 15 from the correspondence table of the element plate type codes corresponding to the holder identification code. (S2030). Figure 7
A code system diagram of the storage means 15 is shown in (b).

The element plate management code 6 read in (S2010) and the element plate type code acquired in (S2030) are compared (S2).
040).

The comparison result is output (S2050).

The element plate management code comparison is completed (S2060).

The radiation measuring apparatus 100 having the above-described structure includes an element plate management code 6 recorded on the element plate 2 of the photostimulation luminescence dosimeter 10 and an element plate management code corresponding to the holder identification code 7 recorded on the holder 3. Can be compared.

The photostimulable luminescence dosimeter 10 is an OSL
Since a crystal or a thermophosphor is used as a radiation detecting material, the combination of the detector 1, the element plate 2 and the holder 3 is always the same, and the combination of the detector 1, the element plate 2 and the holder 3 is not changed. It must be compatible with both constantly changing OSL crystal measurement methods. Especially in the case of OSL crystal, the combination of the detector 1, the element plate 2 and the holder 3 is constantly changed, and therefore the operator of the radiation measuring apparatus 100 makes a mistake and the detector 1, the element plate 2 and the holder 3 are in the wrong combination. Could be. When the radiation dose is measured with the wrong combination of the detector body 1, the element plate 2 and the holder 3, the measurement data has no reliability. In order to ensure the reliability of the measurement data, it is important to confirm the combination of the detection body 1, the element plate 2 and the holder 3.

In the case of the conventional one-dimensional bar code, a code that can be discriminated by a human is printed together, so that the code can be visually confirmed. But,
The element plate management code 6 and the holder identification code 7 are
For example, since a high-density optical information recording such as a two-dimensional code is recorded in a range of several millimeters square, a code that can be discriminated by a human is not printed. In order for the operator of the radiation measuring apparatus to manually confirm the element plate management code 6 and the holder identification code 7, it is necessary to determine the contents of the high density optical information recording using a dedicated reader. These operations are
It imposes a heavy burden on the operator of the radiation measuring apparatus and is prone to judgment errors. According to this embodiment, such a problem can be solved.

[0076]

As described above in detail, according to the present invention, an element corresponding to a photostimulable luminescence dosimeter using a high density optical information recording technique and a combination of an element plate and a holder changing each time measurement is performed. It is possible to provide the shapes of the plate and the holder, the code system, and the radiation measuring device.

Further, by continuing to use the manufacturing equipment of the thermo-fluorescence dosimeter, the equipment introduction cost of the manufacturing factory is reduced, and as a result, an inexpensive photostimulable luminescence dosimeter and radiation measuring apparatus are provided to the market. be able to.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a photostimulated luminescence dosimeter according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a photostimulated luminescence dosimeter according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a radiation measurement value apparatus according to a third embodiment of the present invention.

FIG. 4 is a code system diagram in the case where two detectors 1 are attached to the element plate 2 according to the third embodiment of the present invention.

FIG. 5 is a flowchart of a radiation measuring method of the radiation measuring apparatus according to the third embodiment of the present invention.

FIG. 6 is a configuration diagram of a radiation measurement value device according to a fourth embodiment of the present invention.

FIG. 7 is a code system diagram when two detectors 1 are attached to the element plate 2 according to the fourth embodiment of the present invention.

FIG. 8 is a flowchart of an element plate management code comparison method for a radiation measuring apparatus according to a fourth embodiment of the present invention.

[Fig. 9] Configuration diagram of an individual exposure dosimeter used for individual exposure management

FIG. 10: Code system diagram of thermofluorescence dosimeter

[Explanation of symbols]

1 detector 1a First detector 1b Second detector 2 element plate 3 holder 4 hangers 5a Bar code for dosimeter management 5b User management bar code 6 element plate management code 7 Holder identification code 8 element plate drawing means 9a Thermofluorescence dosimeter detector 9b Thermofluorescence dosimeter element plate 9c Thermofluorescence dosimeter holder 10 Photostimulated luminescence dosimeter 10a Radiation detection material 10b base film 10c cover film 11 First reading means 12 Stimulating means 13 Light receiving means 14 Measuring means 15 storage means 16 Conversion constant acquisition means 17 First correction coefficient acquisition means 18 Second correction coefficient acquisition means 19 Calculation means 21 Second reading means 22 Comparison means 23 Element plate type code acquisition means 100 Radiation measuring device

Claims (13)

[Claims] 1. A photostimulated luminescence dosimeter having a detection body using an OSL crystal or a thermoluminescent phosphor as a radiation detection material, and an element plate holding the detection body, wherein the element plate is at least the element plate. A photostimulation luminescence dosimeter, which is provided with an element plate management code for managing the device. 2. The element plate management code includes at least an element plate type code indicating a type of the element plate and a sensitivity correction coefficient for correcting the sensitivity difference of the detection body. Photostimulable luminescence dosimeter. 3. The photostimulated luminescence dosimeter according to claim 1, wherein the element plate management code includes at least an element plate type code indicating a type of the element plate and a manufacturing lot number of the detector. 4. The photostimulated luminescence dosimeter according to claim 1, wherein the element plate management code uses high density optical information recording. 5. A photostimulation luminescence dosimeter comprising a detector that uses an OSL crystal or a thermophosphor as a radiation detector material, an element plate that holds the detector, and a holder that holds the element plate. The element plate has at least an element plate management code for managing the element plate, and the holder has a holder identification code for identifying the holder. 6. The element plate management code includes at least an element plate type code indicating the type of the element plate, and the holder identification code includes at least a holder type code indicating the type of the holder. The photostimulated luminescence dosimeter described. 7. The photostimulated luminescence dosimeter according to claim 5, wherein at least one of the element plate management code and the holder identification code uses high density optical information recording. 8. An element recorded on an element plate in a radiation measuring apparatus for stimulating a detector using an OSL crystal or a thermophosphor as a radiation detecting material and receiving and measuring the light emitted from the OSL crystal or the thermophosphor. First reading means for reading the plate management code, stimulating means for stimulating the detection body, light receiving means for receiving light emitted by the detection body and outputting an electric signal, and measuring an electric signal output by the light receiving means Measuring means for outputting as an electric signal amount, storage means for storing a correspondence table of a conversion constant for converting the electric signal amount into a radiation dose and an element plate type code of an element plate management code, and an apparatus correction coefficient, Conversion constant acquisition means for acquiring a conversion constant corresponding to the element plate management code from the storage means, and sensitivity correction coefficient from the element plate management code First correction coefficient acquisition means, second correction coefficient acquisition means for acquiring a device correction coefficient from the storage means, at least the electric signal amount, the conversion constant, the sensitivity correction coefficient, and the device correction coefficient are used. A radiation measuring apparatus comprising a calculation means for calculating a radiation dose. 9. A radiation measuring method for stimulating a detector using an OSL crystal or a thermophosphor as a radiation detecting material, and receiving and measuring light emitted from the OSL crystal or the thermophosphor. The element recorded on an element plate. An element plate management code reading step of reading a plate management code, a step of stimulating a detection body, an electric signal quantity output step of receiving light emitted by the detection body and outputting it as an electric signal quantity, and an electric signal quantity A conversion constant acquisition step of acquiring a conversion constant corresponding to the element plate management code read in the element plate management code reading step from the correspondence table of the conversion constant for converting into the amount and the element plate management code of the element plate management code; , Element plate management read in the element plate management code reading step A sensitivity correction coefficient reading step of acquiring a sensitivity correction coefficient from a code, a device correction coefficient acquisition step of acquiring a device correction coefficient, an electric signal amount measured at least in the electric signal amount output step, and a conversion constant acquiring step. A step of calculating a radiation dose using the acquired conversion constant, the sensitivity correction coefficient acquired in the sensitivity correction coefficient acquisition step, and the device correction coefficient acquired in the device correction coefficient acquisition step. Radiation measurement method. 10. An element plate management code reading step of reading an element plate management code recorded on an element plate, a step of stimulating a detection body, and a light emitted by the detection body is received and output as an electric signal amount. From the correspondence table of the electric signal amount output step, the conversion constant for converting the electric signal amount to the radiation dose, and the element plate type code of the element plate management code, to the element plate management code read in the element plate management code reading step. A conversion constant acquisition step of acquiring a corresponding conversion constant, a sensitivity correction coefficient reading step of acquiring a sensitivity correction coefficient from the element plate management code read in the element plate management code reading step, and an apparatus correction of acquiring an apparatus correction coefficient Coefficient acquisition step, and at least output of the electrical signal The electric signal amount measured in the step, the conversion constant acquired in the conversion constant acquisition step, the sensitivity correction coefficient acquired in the sensitivity correction coefficient acquisition step, and the device correction coefficient acquired in the device correction coefficient acquisition step are used. And a computer program including a step of calculating a radiation dose. 11. An element recorded on an element plate in a radiation measuring apparatus for stimulating a detector using an OSL crystal or a thermophosphor as a radiation detecting material and receiving and measuring light emitted from the OSL crystal or the thermophosphor. First reading means for reading the plate management code, second reading means for reading the holder identification code recorded in the holder, storage means for storing a correspondence table of element plate type codes corresponding to the holder identification code, Element plate type code obtaining means for obtaining the element plate type code corresponding to the holder identification code from the recording means, element plate type code of the element plate management code read by the first reading means, and the element plate type code Comprised of comparison means for comparing the element plate type code acquired by the acquisition means Radiation measurement apparatus characterized in that it is. 12. An element plate management code comparing method in a radiation measuring apparatus, an element plate management code reading step for reading an element plate management code recorded on an element plate, and a holder identification code for reading a holder identification code recorded on a holder. A reading step; an element plate type code obtaining step of obtaining an element plate type code corresponding to the holder identification code read in the holder identification code reading step from a correspondence table of element plate type codes corresponding to the holder identification code; An element plate type code that compares the element plate type code of the element plate management code read in the plate management code reading step with the element plate type code obtained in the element plate type code obtaining step. Element plate management code comparison method which comprises a comparison step. 13. An element plate management code comparing method in a radiation measuring apparatus, an element plate management code reading step for reading an element plate management code recorded on an element plate, and a holder identification code for reading a holder identification code recorded on a holder. A reading step; an element plate type code obtaining step of obtaining an element plate type code corresponding to the holder identification code read in the holder identification code reading step from a correspondence table of element plate type codes corresponding to the holder identification code; An element plate type code that compares the element plate type code of the element plate management code read in the plate management code reading step with the element plate type code obtained in the element plate type code obtaining step. Information recording carrier, characterized in that it stores a computer program including a comparison step.